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The geminal complexes formed after adsorption of small molecules on cationic sites may be divided into two main groups: site- and complex-specified. Complex-specified formation always occurs during the interaction of definite cations with certain molecules. Typical examples are the Co 2+ (NO) 2 species. A peculiarity, in this case, is that the geminal complexes are more stable...
CoY, with its low activity in selective catalytic reduction (SCR) of nitrogen oxides, differs from Co-exchanged pentasil zeolites (e.g. Co-ZSM-5). To obtain more information on the SCR mechanism, the NO x species formed after NO adsorption and NO+O 2 co-adsorption on CoY were studied by means of IR spectroscopy and the results were compared with those obtained for Co-ZSM-5. NO adsorption...
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